Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - LDO voltage regulator Positive, fixed or adjustable TO 263 5

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   

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SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Fast Transient Response

D 10-mA to 3-A Load Current

D Short Circuit Protection

D Maximum Dropout of 450-mV at 3-A Load

Current

D Separate Bias and VIN Pins

D Available in Adjustable or Fixed-Output

Voltages

D 5-Pin Package Allows Kelvin Sensing of

Load Voltage

D Reverse Current Protection

description

The UC382 is a low-dropout-linear regulator providing a quick response to fast load changes. Combined with

its precision onboard reference, the UC382 excels at driving GTL and BTL buses. Due to its fast response to

load transients, the total capacitance required to decouple the regulator’s output can be significantly decreased

when compared to standard LDO linear regulators.

Dropout voltage (VIN to VOUT) is only 450 mV maximum at 100°C and 350 mV typical at 3-A load.

The onboard bandgap reference is stable with temperature and scaled for a 1.2-V input to the internal-power

amplifier. The UC382 is available in fixed-output voltages of 1.5 V, 2.1 V, or 2.5 V. The output voltage of the

adjustable version can be set with two external resistors. If the external resistors are omitted, the output voltage

defaults to 1.2 V.

block diagram

THERMAL

SHUTDOWN

1.2 V

BANDGAP

REFERENCE

3 5

SHORT

CIRCUIT

SENSE

UC382−ADJ

UC382−1 (1.5 V)

UC382−2 (2.1 V)

UC382−3 (2.5 V)

OPEN 0

2 k 500

Ω

2 k 1.5 k

Ω

2 k 2.16 k

Ω

R1 R2

ADJGND VOUT

VIN

UDG-00080

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

5-PIN TO-263

TD PACKAGE

(TOP VIEW)

5-PIN TO-220

T PACKAGE (TOP VIEW)

Note: Tab = Ground

All trademarks are the property of their respective owners.

Summary of content (19 pages)

PAGE 1
SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 D D D D D D D D Fast Transient Response 10-mA to 3-A Load Current Short Circuit Protection Maximum Dropout of 450-mV at 3-A Load Current Separate Bias and VIN Pins Available in Adjustable or Fixed-Output Voltages 5-Pin Package Allows Kelvin Sensing of Load Voltage Reverse Current Protection 5-PIN TO-220 T PACKAGE (TOP VIEW) 5-PIN TO-263 TD PACKAGE (TOP VIEW) N
PAGE 2
SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 absolute maximum ratings over operating free-air temperature (unless otherwise noted)†} VB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 V VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 electrical characteristics, TA = −40°C to 100°C for the UC282-X series and 0°C to 100°C for the UC382-X, VB = 5 V, VIN = 3.3 V, VOUT = 2.5 V for the UC382-ADJ, TA = TJ, (unless otherwise stated) UC382-2 fixed 2.1 V, 3-A family PARAMETERS MIN TYP MAX UNITS UC382-2 TEST CONDITIONS 2.079 2.100 2.121 V Output voltage (IVOUT = 100 mA) UC282-2 2.058 2.
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SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 electrical characteristics, TA = −40°C to 100°C for the UC282-X series and 0°C to 100°C for the UC382-X, VB = 5 V, VIN = 3.3 V, VOUT = 2.5 V for the UC382-ADJ, TA = TJ, (unless otherwise stated) UC382-ADJ adjustable, 3-A family PARAMETERS ADJ voltage (IVOUT = 100 mA) Load regulation MIN TYP MAX UNITS UC382-ADJ TEST CONDITIONS 1.188 1.200 1.
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SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 pin descriptions (continued) DROPOUT VOLTAGE (VB − VOUT) vs LOAD CURRENT DROPOUT VOLTAGE (VIN − VOUT) vs LOAD CURRENT 1.9 400 VDO - Dropout Voltage - mV VDO - Dropout Voltage - V TJ = 275C 1.8 1.7 1.
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SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 OPEN LOOP PHASE vs FREQUENCY OPEN LOOP GAIN vs FREQUENCY 0 70 60 40 Phase - deg Gain - dB 50 30 −90 20 10 0 −180 −10 100 1k 10 k 100 k 1M 10 M 100 1k 10 k f − Frequency − Hz f − Frequency − Hz PSRR - Power Supply Rejection Ratio (VB INPUT) − dB Figure 3 Figure 4 POWER SUPPLY REJECTION RATIO (VB INPUT) vs FREQUENCY 60 50 40 30 20 10 0
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SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 APPLICATION INFORMATION 5V 1 µF CER 1 3.3 V 2 + VIN 4.7 µF TANT VB VOUT 4 + 100 µF TANT UC382−ADJ GND ADJ IRF 520 VO = 1.2 V 121 Ω R1 PULSE GENERATOR 5 3 UDG-00081 Figure 6.
PAGE 8
SLUS317B − JANUARY 2000 − REVISED FEBRUARY 2004 APPLICATION INFORMATION +5 V + 4.7 µF CER KELVIN SENSE POINT 1 +3.3 V 2 VB VIN + 4.7 µF VOUT R3 60 Ω UC382−ADJ TANT GND ADJ +1.8 V OUTPUT 4 5 + 330 µF OSCON 2.2 µF CER R4 120 Ω 3 UDG-00082 Figure 8. Typical UC382-ADJ Application +5 V + 4.7 µF KELVIN SENSE POINT 1 2 VIN VB VOUT + 330 µF OSCON UC382−1 GND ADJ +1.5 V OUTPUT 4 2.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
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PACKAGE MATERIALS INFORMATION www.ti.com 9-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant UC282TDKTTT-1 DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC282TDKTTT-3 DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC282TDKTTT-ADJ DDPAK/ TO-263 KTT 5 50 330.0 24.4 10.6 15.6 4.9 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 9-Sep-2013 Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TO-263 UC382TDTR-3 DDPAK/ TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.0 Q2 UC382TDTR-ADJ DDPAK/ TO-263 KTT 5 500 330.0 24.4 10.6 15.6 4.9 16.0 24.
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PACKAGE MATERIALS INFORMATION www.ti.com 9-Sep-2013 Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) UC382TDTR-ADJ DDPAK/TO-263 KTT 5 500 367.0 367.0 45.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.